Reenforced concrete cribbing



Feb. 26, 1929. 1,703,303

J. M. FITZGERALD l REENFORCED CONCRETE CRIBBING Filed Oct. 30, 1925 wir@ Patented Feb. 26, 1929. p

UNITED STATES 1,703,303 PATENT OFFICE.

JOHN M. FITZGERALD, OF RIVER FOREST, ILLINOIS.

i REENFORCED CONCRETE CRIBBING.

Application mea october 3o, 1925. serial No'. 65,728.

rlhis invention relates to cribbing of preformed units, and more particularly to ller blocks used with such units. i

The invention consists of the devices and combinations of devices herein illustrated and described. and more particularly pointed out in the claims appended hereto.

In the drawings:

Figure 1 illustrates, in a perspective view one form of cribbing construction to which mv invention is applied.

Figure 2 is a side elevation of filler blocks.I spacing apart the rear ends of the anchor units of the crib.

Figure 3 is an enlarged view in perspective, of the filler block.

Figure 4 is a view similar' to Figure 2, showing a modification of the anchor units.

Figure 5 is' an end view, partly 1n section, of the modification shown in Fig. 4.

Figures 6 and 7 are side and end elevations. respectively, of another modified form of anchor units.

In said drawings, the front crib wall shown in Figure 1 is composed of layers of stretcher units 13, substantially square in the body portion and provided at each end with downwardly projecting members 15, whereby the superposedlayers are provided with drainage spaces 19, extending longitudinally of the wall. The ends of the units 13 are shown notched or kerfed, 14, in this instance, for ready interlocking connection with the end of the header or anchor units 10. These are provided with laterally extending flange members 11 forming a T- shaped end to interlock with the stretcher units.

There is no rear wall to the crib, the header units 10 merely extending to the rear, as shown in Figure 1, and in this' position they act as anchor members for the front wall when the earth or other filling material is positioned upon and between them and up' against the rear face of the crib front wall.

As shown in Figure 1, some of the stretchers v13 are shorter than others to provide broken or staggered joints between the stretcher ends and T-shaped headers. Then the joints are so staggered, there is a space between the lower and upper surfaces of the T-shaped heads of the free ends of the headers in the same vertical plane. To

" units 10 and 13 having interlocking means space these ends apart, vertically, when no rear cribbing wall is used, a filler block B of a height equal to the space between the the headers, the inside faces 26 of the yflanges 25 functioningl asshoulders to arrest any tendency of lateral movement or shifting of the header-anchor units.

The header units 10, shown in Figure 1, are provided with downwardly extending members 12 which are of equal height as the members 15 on the stretchers, and these pre- .vent the blocks B from being shifted rearwardly.

In the form shown in Figures 4 and 5, the downwardly projecting members 12 are omitted and the blocks B, positioned as before, are prevented from becoming shifted f rearwardly by the contactof. the ends 27 of the block flanges 25, with the inside faces of the anchor anges 11.

In some instances it is not necessary to provide specific means described for lpreventing the blocks from rearward movement, and therefore the header or anchor units need have a T-shaped interlocking head at one end only, i. e. where the header interlocks with s'tretcher units to form the front wall of the crib.

Such a modiiication is indicated by Figures 6 and 7, where the rear end of the header is of the same cross-sectional area and form as the body, and where the flanges 11 and depending member 12 are entirely omitted.

The advantage of having the headers pro- .vided with a T-shaped head at each end is of convenience in enabling either end to be used as the interlocking member of the front wall, as well as of a rear wall when used, and also of affording means for holding the blocks B from being shifted rearwardly from between the ends of the headers. The advantage of the block-separated ends of the anchor members shown in Figures 6 and .7 is mainly one of saving of materialsby the omission of the members 11 and 12.

Vhile I have shown header and stretcher to form the front wall, and as to which means, per se, I am making no claims herein,

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it Will he manifesty that header and stretcher units having other forms of interlock tor a front Wall may be used with a filler block to separate the rear ends ot the headers when n0 rear crib wall is used, and when the headers proper function mainl;r rearwardly eX- tending anchor members YFor the front Wall.

I claim as my invention:

l. .An open-sided cellular cribbing strncture of pre-formed, reinforced concrete units, comprising; the einnbilzation et superposed header units, each having a T-shapcd end, and superposed stretcher units adapted for interlocking engagement with the T- shaped header end to form a cribbing Vall,

vthe spaced 'free ends of said header units extending at substantially. right angles to said Wall, aud. a spacer block provided 0n each end with vertically extending' flanges adapted for Contact with the sides of the spacedv header units adjacent their free ends to keep the Wall in vert' al alignment.

2. In an open-sided cellular cribbing structure the combination with a plurality of stretcher members, a plurality of transversely extending. header members, each header member having' a T-shaped end adapted for interlocking connection with the stretcher ends to form a cribbingr Wall, the header units forming' transversely extending, spaeedapart Walls, with the ends of the headers free7 a spacer block located between the free ends ot the header units and having spaced apart ilanges on its ends adapted tor engagement with the sides of the header units `to prevent.- lateral movement between the block and said units and preserve the vertical alignment of the transversely extending Wall, the stretchers, headers and blocks being preformed units of reinforced concrete.

3. An open-sided cellular eribbing ot' preforn'led, reinforced concrete units, Comprising a plurality ot supper-posed stretcher units aud header units, each header having' a T-shapcd end to interloekinlly engage the stretcher ends to torni a retaining wall. the headers being superposed toorm a. plurality of spaced-apart brace walls extending trans versely of the retainiingl Wall` the tree ends et the header units being spaced apart. by spacer blocks. and means to prevent the lateral movement. oi the header ends and the blocks to preserve the vertical alignment of the headers in each transverse Wall.

4. An open-sided cellular cribbing structure of pre-formed reenforced concret units, comprising' the combination of superposed header units having T-sliaped ends. and superposed stretcher units adapted tor interlockingr engagement with one of the ends of the T-shaped headers to 'form a eribbing` wall, and a liller block of a height. to fit between the bodies'of headers in alternate rows of cribbing units, arranged between the tree ends of said headers.

5. An open-sided cellular cribbine' structure ot pre-formed reenforced concret units. comprising the combination ot snpcrposed header units each having' a. T-shaped end. and superposed stretcher units adapted for interlocking engagement with the, T-shaped header end to form a cribbing wal]` and a filler block of a height equal to the distance between the bodies of adjacentheaders. arranged between the free ends ot said headers,

In testimony, that I, claim the VtoregggoiireT as my invention, I affix my signature, this 28th day of October, 1925.

JOHN M. FITZGERALD. 

